The objective is not simply to improve image resolution or signal-to-noise ratio; rather, it is to improve outcomes for individual patients and society at large.
目标并不是简单的提高图形分辨率或是信噪比率;确切的说,是给每个患者和社会带来更大程度的帮助。
The diagram does not consider additional constraints: decreased resolution due to diffraction and increased susceptibility to fixed pattern noise with longer exposures.
图表没有考虑其他限制因素:衍射造成的低分辨率,长时间曝光带来的对固定图形噪声的敏感性。
The ultimate limit of resolution in an electrical measurement is defined by Johnson or thermal noise.
在电子测量中分辨率的最终极限是由约翰逊噪声或者热噪声来决定的。
Higher speeds are more sensitive to photons but are generally lower in resolution and more susceptible to noise.
更高的速度较为敏感的光子,但分辨率一般较低,更容易受到噪声。
Due to the complicated background of objectives and the speckle noise in the high-resolution SAR images, it is almost impossible to extract roads directly from original remote sensing images.
由于高分辨率SAR图像中,目标背景复杂,同时由于受相干斑噪声的影响,因此很难直接从原始图像数据中提取道路特征。
Numerical tests show this method is powerful in resistance to noise and is of high resolution, therefor suits to image finite and noisy data.
数值试验表明,这种方法抗噪声能力强,分辨率高,很适合于有限观测数据并且含有噪声的数据成像。
Direct Digital Synthesizer (DDS) has the advantages of high frequency resolution, rapid frequency change rate and low phase noise.
直接数字频率合成器dds具有极高的分辨率、频率转换速度快、相位噪声低等优点。
For one step direct method, it is essential to have a two dimension pattern plate with high resolution, high contrast and low noise.
一步直接法,必须要有高分辨率,高对比度和低噪声的二维模板,否则必然导致失败。
A broadband, high resolution and low phase noise frequency synthesizer used in electronic detection and electronic countermeasure system is described in detail.
详细介绍了一种用于电子侦察与对抗系统中的宽带、高分辨率、低相位噪声频率合成器。
As the background of objectives in high-resolution SAR images is complicated and also affected by speckle noise, it is almost impossible to extract roads directly from original remote sensing images.
高分辨率SAR图象中目标背景复杂,同时由于受相干斑噪声的影响,很难直接从原始图象数据中提取道路特征。
The paper was based on the goal of low phase noise, high resolution to study and analyze the wideband frequency source.
本文正是基于低相位噪声、高分辨率为目的,对宽带频率源作了研究和分析。
Low resolution and low signal noise ratio are big obstacles in the way of increasing the accuracy and level of deep strata exploration.
深层地震反射资料分辨率、信噪比低是制约进一步提高深层勘探精度,加大深层勘探力度的重要因素。
But it can produce false images when using a single attribute to resolve geological problem because of the limitation in resolution and signal to noise ratio of seismic data.
但由于受地震资料分辨率和信噪比的限制,用一种地震属性去研究地质问题往往容易产生偏差。
In accordance with the features of low resolution, short processing time and low signal noise ratio of the high frame TV pixels, authors investigated its locating and tracking algorithm.
针对高帧频电视象元分辨率低、处理时间短、信噪比低的特点,对其定位跟踪算法进行了研究。
The noise in constant beam-width beam space is spatial correlative and color (non white), which affects the performance of wide-band-beam-space high resolution DOA (Direction of Arrival) estimator.
恒定束宽波束域噪声是空间相关的非白噪声,这给宽带波束域高分辨方位估计方法的性能带来影响。
Simulation results show that non-stationary noise can be identified in time domain and resolution improvement is obvious compared with that of conventional noise detection in frequency domain.
实验表明:非平稳噪声在时域中是可以识别的,与传统的噪声频域检测方法相比,分辨率有明显的改善。
While complex spectral OCT can not only (eliminate) ambiguities noise and improve the images resolution, but also realize valid measuring depth in full range.
复谱频域oct不仅可以消除图像的混叠,提高图像的分辨率,而且可以实现全量程的有效深度探测。
According to the characteristics of ultrasonic signal, it can be used to deal with correlation technique to filter noise and improve resolution.
根据超声信号的特点,可以利用相干检测理论对信号进行处理,从而达到滤除噪声、提高分辨力的目的。
Results:The qualities of clinical images were closely related to such parameters as CTDI, noise level, density resolution and spatial resolution.
结果:临床照片图像质量与剂量指数、噪声水平、密度分辨率和空间分辨率关系密切。
According to the feature of the MRA, this paper presents a noise filtering method of adaptive fuzzy threshold for wavelet classification base on multi resolution.
针对小波变换多分辨分析(mra)的特点,本文提出一种多尺度分级的自适应模糊权重中值滤波的去噪方法。
It was different from commonly used high resolution process, wavelet transform could improve the resolution of seismic recording and effectively avoid the interference of noise.
与常用的高分辨率处理技术不同,小波分频处理方法在提高地震记录分辨率的同时,还可以有效地压制噪音的干扰。
The means can not only raise resolution but also not reduce signal and noise ratio.
它既提高了地震记录的分辨率又不降低其信噪比,是一种既经济又理想的处理方法。
The DC charge based and ac based capacitance measurement technologies are analysised from the point of noise performance, which is the key factor to determine the resolution of measurement.
从电路噪声的角度分析了直流充放电法和交流激励法电容测量技术的性能,得出交流法在增加电路复杂度极小的条件下,可获得较高的电容分辨率。
High signal to noise ratio is the basic one in the three factors of high resolution exploration, so without it the high resolution and high fidelity can't exist.
高分辨率勘探三要素中,高信噪比是基础,没有高信噪比就没有高分辨率和高保真度。
Johnson noise imposes a theoretical limit to achievable voltage or current resolution.
约翰逊噪声给出了可以达到的电压或电流测量分辨率的理论极限值。
The parameters contain impulse noise, memory effect, scan correlated shift, coherent noise, random noise, dropped lines, inoperable detectors, saturated detectors, MTF, system resolution.
辐射性能参数包括脉冲噪声、记忆效应、扫描相关偏移、一致噪声、随机噪声、丢失行、不可操作探测器、饱和探测器、调制传递函数、系统分辨率。
It has great advantages of frequency stability, high frequency resolution, speed of frequency switching, simple analysis of phase noise and spurious, small size and low power.
其具有频率稳定度好、频率分辨率高、频率切换速度快、相位噪声和杂散干扰分析相对简单、体积小、功耗低等优势。
However, there is high Barkhausen noise in the integration sensor making by GMR materials, it affect the resolution ratio and stability of integration sensor, and imprison its applications.
由于用GMR材料制成的集成化传感器存在较高的巴克·豪森噪声,影响了集成化传感器系统的分辨率和稳定性、限制了它的应用。
The results demonstrated that this technology can improve imaging of coal seams in structure complicated areas and coalfield seismic data signal-to-noise performance and resolution effectively.
结果表明:叠前时间偏移技术能够有效地提高构造复杂地区煤层的成像效果,提高煤田地震资料的信噪比和分辨率。
But the random noise added to low resolution images will have unpredictable influence over the synthesized high-resolution images.
但是,加在低分辨率图像上的随机噪声会对合成的高分辨率图像产生不可预知的影响。
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